Heat interchanger



A. L., STEVENS Jan; 8, Q HEAT'INTERCHANGER Filed May e, 1953 2Sheets-Sheet 1 Jan. 8, 1935.

A. L. STEVENS HEAT INTERCHANGER 2 Sheets-Shet 2 Filed May 6, 1933Patented Jan. 8, 1935 UNITED STATES PATE OFFICEn Arthur L. tiifisf lifrifsiz fiif assignor, by

mesne assignments, Evanston, 111.

to Katherine Stevens,

\ Application May 6, 1933, Serial No. 669,651 r ;4 Claims. (01.257-139)This invention relates to heat interchange'rs and more particularly tosteam radiators and the like.

The principal object of this invention is to provide a radiator of'efiicient design and pleasing appearance.

Anotheriobject of this invention is to provide a radiator of sheet metalconstruction.

A further object is to provide a radiator efficient in operation andeconomical to manufacture.

A still further object is to provide a radiator having a large radiatingsurface while occupying a relatively small space.

Another object of this invention is to facilitate i5 .the'manufacture ofradiators of this type. by providing a radiator constructed, of severalpairs of identical parts.

Further objects will appear herein.

In present practice, heat interchangers generally and particularly steamradiators and the like are ordinarily constructed of cast metal, eachradiator usually being cast in a plurality of small sections, saidsections being assembled and secured to each other by means of bolts,etc., in order to provide a chamber of necessary capacity and a suitablylarge radiating surface. This method of constructing a radiator has longbeen recognized as being expensive both in the casting of thesesections, and also in the assembling of the sections to construct thecompleted radiator. Various attempts have been made from time to time toprovide a radiator of a sheet metal construction, but none of these haveheretofore been highly satisfactory. In the various attempts to providea radiator of a sheet metal construction, a number of dimculties havebeen encountered,

the principal difliculties being that the formation of the sheetmetalplates used have been somewhat complicated, and therefore expensiveto manufacture, and difficulties have been encountered in sealing theseplates to each other and to an inlet and outlet means for steam.

Another difiiculty that has been encountered in some of the attempts toprovide a radiator of sheet metal construction is that these radiators,as heretofore designed, have been constructed of a large number ofseparate pieces, and have therefore been expensive to assemble. Thepresent invention provides a radiator of sheet metal construction, whichsolves the difficulties just mentioned by reason of the fact that it iseconomical to manufacture and is composed of a relatively small numberof pieces in such a manner that they may be easily manufactured andassembled.

Referring now to the drawings in which I have illustrated the preferredembodiment. of this invention:

Fig. 1 15 a front elevational view of this radiator and its associatedfittings. Fig. 2 is an end elevation showing this invention as viewedfrom the 5 right hand side of Fig. 1. Fig. 3 is a top plan of thepreferred form of this invention. Fig. 4 is a fragmentary plan sectiontaken substantially on the plane of the line 4-4 in Fig 1. Fig. 515 adetail section taken substantially on the plane of lo the line 55 inFig. 1. Fig. 6 is a detail sectional view illustrating the means usedherein for securing and sealing the sheet metal plates of this device toprovide a steam chamber. Fig. '7 is an enlarged plan section of theoperative parts of this device. Fig. 8 is an enlarged plan sectionsimilar to Fig. 7 showing a slightly modified form of plates. Fig. 9 isa fragmental detail section of another modification of this device.

Referring now particularly to Figure 1, the steam supply pipe 10 isprovided with the usual valve 11, the outlet of this valve 11 beingconnected to an elbow 12, screw threaded to the lowermost end of aninlet pipe 13. This inlet pipe 13 is provided with a longitudinal slot14 to provide a passageway for the steam between the inlet pipe 13 andthe radiator proper. The radiator proper consists of two sheet metalplates 15 and 16, these plates being corrugated as shown in Fig. 7, andbeing spaced apart by spacing rods 17 and 18 at their top and bottomedges. By an examination of Fig. '7, it will be seen that the plates 15and 16 are of identical size and shape, and that when reversed from oneanother as shown in Fig. 7, their configuration is such that they willlie spaced apart equidistant at all points, and provide a continuouscircuitous steam passage 19 of uniform cross-sectional area. The spacingrods 17 and 18 are shaped to conform to the shape of this passage 19,and it will be seen that these spacing rods 1'7 and 18 are alsoidentical in size and shape. As seen in Figs. 5 and 6, these spacingrods 17 and 18 are positioned at the extreme uppermost and lowermostedges of the plates 15 and 16, and are secured thereto by any suitablemeans, such as welding, as at 20, Fig. 6. Having been thus sealed at thetop and bottom by the spacing rods 17 and 18, the plates 15 and 16 maythen be inserted in the slot 14 of the inlet pipe 13 and may be securedto the inlet 50 pipe 13 by any suitable means such as welding asindicated at 21, (See Fig. 4). It should be understood that the slot 14in the inlet pipe 13 is of a suitable length to exactly fit the assemblyof plates 15 and 16 and spacing rods 1'7 and 18, 55

and that the welding 21 will therefore serve to connect the steampassage 19 with the inlet pipe 13 and seal this passage from the outsideatmosphere. At the end of the radiator, opposite the inlet pipe 13 is aslotted outlet pipe 22 which is identical in every respect with theinlet pipe 13, and is provided with a slot 23 by means of which theassembly of plates 15 and 16 and spacing rods 1'7 and' 18 is connected,as just described. At the lower end of the slotted outlet pipe 22, thereis provided an elbow 24 by which the radiator, is connected to thecustomary trap 25, and return pipe 26. The upper ends of the inlet pipe13 and the outlet pipe 22 are provided with caps 27, which serve to sealthe upper ends of these pipes. Immediately below the plates 15 and 16there is provided an ornamental grille 28 through which the inlet pipe13 and the outlet pipe 22 may pass, and this ornamental grille 28 isheld in position by means of the elbows l2 and 24 as shown in Fig. 1.Immediately above the plates 15 and 16, there is provided anotherornamental grille 29, which is identical to the grille 28, and which isheld in position by means of the caps 27 as shown in Fig. 1. Legs 30 areprovided to support the radiator and these may be secured to the lowerside of the grille 28 by any suitable means.

From the foregoing description, it will be seen that the radiator, asjust described, will be economical to manufacture since it is assembledby means of a simple welding operation, and by means of threading theelbows 12 and 24, and the caps 27 on to their respective inlet andoutlet pipes 13 and 22. It should also be noted that each of theindividual parts used herein, is used in pairs, and this fact results ina much more economical method of manufacture as will be well understoodin the art. In Fig. 9, I have illustrated a slight modification of theornamental grille 29 in that I have provided it with an upraised portion31 in order that the top surface 32 of this grille may be substantiallyon a plane with the top surface 33 of the caps 27.

While I have described the preferred form of this invention, it iscapable of numerous modifications, and should not be limited except asby the appended claims.

I claim the following:

1. A heat interchanger comprising a pair of plates, spacing rods unitedwith said plates and serving to seal their two opposite edges to form a.chamber, slotted inlet and outlet pipes adapted to communicate with thischamber, pipe fittings secured to these inlet and outlet pipes, andornamental grilles secured to the inlet and outlet pipes by means oftheir associated pipe fittings.

2. A heat interchanger comprising a pair of plates, a steam chamberformed by said plates, pipe fittings communicating with said steamchamber, and ornamental grilles secured to aforementioned plates bymeans of said pipe fittings.

3. A heat interchanger comprising a steam chamber, ornamental platesassociated therewith, pipes adapted to pass through openings in saidplates and communicate with the steam chamber, and pipe fittings adaptedto secure said plates to the pipes.

4. A heat interchanger comprising a steam chamber, ornamental grillespositioned at two opposite sides of the steam chamber, a pipe adapted tocommunicate with the steam chamber and to extend between the twoornamental grilles, and pipe fittings associated with said pipe in amanner to preventthe displacement of the omamental grilles.

ARTHUR L. STEVENS.

